Load balancing is not working correctly during server fail-over

Hi,
          We have 4 weblogic instances in a cluster with proxy-plugin load balancing the requests. When instance 1 is shutdown, all the subsequent requests from users whose sessions were at instance1 are sent over to instance2 only. They are not divided between instance2, instance3 and instance4.
          Can somebody, please, tell if there is any solution to this so that sessions for users who were being redirected to instance1 will be divided between instances 2,3 and 4.
          Thanks,
          Prasad

It is not possible because in a cluster server1 always chooses the same secondary server (with some algorithm)
          So all sessions with primaries on server1 will have secondaries on same secondary server.
          So if primary is down, all the requests(that has primaries on server1) will be routed to the same secondary server.
          -Vijay

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Oracle Applications 11i Load Balancing does not work with RAC one Node

Hi all,
Could you help me to resolve this issue.
Architecture environment is :
- One APPS tier node
- Two nodes Oracle Database Appliance (Primary node 1 holds INSTANCE_1 et Secondary node is configurured to holds INSTANCE_2), i.e RAC one Node.
- The primary node have instance_name SIGM_1 and the secondary node have instance_name SIGM_2, but in RAC one node, the secondary instance is not alive.
We convert our EBS 11i environment to RAC following note ID Using Oracle 11g Release 2 Real Application Clusters with Oracle E-Business Suite Release 11i [ID 823586.1].
When testing Database failover, Oracle Applications 11i load balancing does not work anymore.
The root cause is that, when the primary node of the Rac one node is down, the INSTANCE_NAME_1 is automaically relocating to the surviving node,.
During test failover, we imagine that when the primary node goes down, the secondary node start or relocate database with instance_name SIGM_2, and in that case the Oracle Applications load balancing works.
Currently, when the primary node goes down, the instance_name SIGM_1 is relocated on the secondary node, which cause failure of Oracle Applications Load Balancing.
Thank you for your advice.
Moussa

This is something I observed a long time ago for Safari (ie: around version 1). I'm not sure this is Safari, per se, but OpenSSL that is responsible for the behavior. I'm pretty sure Chrome does this and I've seen some Linux browsers do it.
What I have done at the last two companies I've worked for is recommend that our clients do not use SSL SessionID as the way of tracking sticky sessions on web servers, but instead using IP address. This works in nearly all cases and has few downsides. The other solution is to use some sort of session sharing on your web servers to mitigate the issue (which also means that your web servers aren't a point of failure for your users' sessions). (One of the products I supported had no session information stored on the web servers, so we could safely round-robin requests, the other product could be implemented with a Session State Server... but in most cases we just used IP address to load balance with). The other solution is to configure your load balancer to terminate the SSL tunnel. You get some other benefits from this, such as allowing your load balancer to reduce the number of actual connections to the web servers. I've seen many devices setup this way.
One thing to consider through this is that - due to the way internet standards work - this really can't be termed a bug on anyone's part. There is no guarantee in the SSL/TLS standards that a client will return the same SSL Session ID for each request and there is not requirement that subsequent requests will even use the same tunnel. Remember, HTTP is a stateless protocol. Each request is considered a new request by the web server and everything else is just trickery to try and get it to work the way you want. You can be annoyed at Safari's behavior, but it's been this way for over 5 years by my count, so I don't expect it to change.

Accessing individual server in load-balanced cluster not working as expected

We have a cluster set up with multiple managed servers and hardware load
          balancers sitting in front to direct traffic. We have the frontend host
          configured to be the dns name of the single URL for the cluster, which maps
          to the IP address that the load balancers balance. When accessing part of
          our site (a WebLogic portal) at
          http://server1/portalApp/appmanager/portal/desktop
          (where server1 is the name of one of the managed servers)
          the portal performs a redirect to the login page at
          /portalApp/appmanager/portal/desktop?_nfbp=true&_pageLabel=login_page.
          The URL that results in the browser is not what I would expect, which would be
          http://server1/portalApp/...
          Instead, it is
          http://cluster/portalApp/...
          where cluster is the frontend host setting. Is there any way to avoid
          this, so we can perform directed testing on specific managed servers?
          Thanks,
          Andy


Hi Maria, thanks for your help! I wrote a simple test jsp that does a
          redirect if a parameter is set, otherwise it doesn't do anything. When I
          accessed the jsp at server1/app/test.jsp?a=true, something (I assume
          either WebLogic or the load balancer) rewrote the URL after the redirect
          (the redirect was to /app/test.jsp). The URL that appears in the browser
          after the redirect is cluster/app/test.jsp. Do you know if this happens
          because of WebLogic or the load balancer? Our load balancers are Cisco
          11503's I believe.
          Do you think it would make any difference if I leave the frontend host
          for the cluster to be the dns name of the cluster, and then if I set the
          frontend host for each server to be the dns name of that specific server?
          Currently each server does not have any value entered for frontend host.
          Thanks!
          Andy
          Maria Carcedo <[email protected]> wrote in
          news:31424665.1108079763742.JavaMail.root@jserv5:
          > Hi Andy!
          >
          > We had basically the same problem and we fixed it by configuring the
          > F5 load balancer to maintain the session with whichever server it
          > started the connection with. We had to enable cookie persistence, more
          > specifically the Active HTTP Cookie, with Method insert (do not enter
          > any expiration or anything else in any other field other than what is
          > already there when the page loads -> F5 bug).
          >
          > So if the original request from the portal goes to server1, every
          > subsequent request will go to server1 as well. The next session
          > request will go to server2 and every subsequent request within that
          > session will go to server 2, and so on (assuming you have round
          > robin).
          >
          > I hope this helps!
          >
          > Maria

Sharepoint 2013 SP1 incoming email in load balanced farm not working on both servers

I have 2 SharePoint 2013 WFE servers with a VIP load balancer.
I have configured the basic scenario incoming email on both servers as per this article
http://technet.microsoft.com/en-ca/library/cc262947(v=office.15).aspx.
The email makes it to both WFEs in the SMTP drop folder but SharePoint picks it up always from one smtp server.
What could go wrong? is there any additional configuration needed so that sharepoint check both servers?

MX records can be pointing to the IPs of your Incoming Email SharePoint servers. They should have the same weight if you want them to load balance, or different weights if you want them to be failover.
Trevor Seward
Follow or contact me at...
&nbsp&nbsp
This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

RV042 Load Balancing not working correctly?

We have an RV042 on firmware version 1.3.13.02 and 2 ISPs:
WAN1 = Telepacific T1
1.5Mbps down and 1.5Mbps up
WAN2 = AT&T U-Verse
12Mbps down and 5Mbps up
I have it set to Load Balance, Primary WAN = WAN2
Network Service Detection enabled, only pinging the Remote Host of 4.2.2.2 and set to Generate Log
Bandwidth is set to:
WAN1 = 1000Kbps upstream & downstream
WAN2 = 5040Kbps upstream & 12000Kbps downstream
It seems to pick WAN1 a lot of the time. Do I have something setup wrong?

Ok, so what do you recommend? To setup binding for ports important to direct over say… WAN1 (my fast access) shall I also keep the bandwidth management set up as is, example:
For me it’s confusing because this config appears to be clear to me that has to control traffic the way I want .
Thanks for your response.
H Aragon
De: jasbryan
Enviado el: lunes, 20 de febrero de 2012 03:18 p.m.
Para: HECTOR MANUEL ARAGON
Asunto: - Re: RV042 Load Balancing not working correctly?
Home
Re: RV042 Load Balancing not working correctly?
created by jasbryan in Small Business Routers - View the full discussion

Share point in server admin not working correctly... I think

I suspect that the share point in server admin is not working correctly. In workgroup manager when I click on a user and then click on the "home" tab, under the full path field I see a file path of:
afp://server.mydomain.com/Users
However if I go to Server Admin -> AFP -> Share Points then click on the Users share and then click on the share point tab below, enable auto mount is disabled. How can this be possible? I thought for a directory to show up in home in workgroup manager it had to be set as an auto mount. Has something possibly corrupted? And what?

Here's a bit more information about our setup and our experiences with Apple's CUPS implementation:
On the server, all printer queues are set up with only lpr and ipp sharing enabled with the PPD setting for each printer set to Generic Postscript. We found that setting the PPD to the printer specific one on the server caused problems when clients tried to use printer specific options, like paper tray selection, etc.. The selection would be undone, apparently because the driver on the server would override the previous settings. Using Generic Postscript allows the client PPD settings to go through unmodified. Our printers are general a mix of HP LaserJets and some Sharp Copiers.
All clients use lpd to the server queues with the printers' actual PPDs configured. Using ipp is superior in that printer feedback (jams, out of toner, etc) makes it back to the clients, but ipp only works when the client, the server, and the printer are on the same network. If the ipp client is not on the same network, the client spooler immediately goes into a paused state and the print job is stuck on the client.
Using lpd to the server queues works reliably, but there is no feedback to the client. Jobs disappear from the client queue and go to the server, appearing to the user as a successful print. If the printer is down, there's nothing they can see or do about it.

RFC Sender (XI 3.0, SP14) Load Balancing doesn't work

Hi all,
We're "desperately" trying to use the Load Balancing option of RFC Sender Adapter (XI 3.0, SP14). It doesn't work.
The Adapter can not register to the sender SAP server. But when we do not use the "Load Balancing" option, everything works well.
We did follow the XI guidelines step-by-step. All necessary configurations in XI and in SAP sender system (TA: SM59) are "properly" done and reviewed by different experts several times.
Do you have, by chance any running scenario using "Load Balancing" within a RFC Adapter? If yes, I would appreciate if you can share it with me.
Thanks a lot!
Regards,
Khaled

Hello Khaled,
the RFC sender adapter registers a program at the SAP Gateway. Load Balancing for the Sender Adapter means, that you have at least two J2EE server nodes within your XI installation. On all these server nodes the same RFC sender adapter is started and register the same program at the same gateway. The load balancing is then handled by the gateway. That means, that for the sender adapter the settings are the same, even if you use load balancing or not.
The settings are, e.g.
- SID=ABC
- hostname=abchost (central instance, message server)
- hostname=xyzhost (additional dialog instance of ABC)
- instance nr=00
application server (gateway): xi1host
application server service (gw-service): sapgw00
programm id: could be freely choosen
The Metadata Repository could be connected using load balancing. Here a user need to log on to the system.
The settings here must be:
Message-Server: abchost
Message-Server-Service: sapmsABC
System-ID: ABC
Logon-Group: e.g. PUBLIC; this logon group need to be created in system ABC using transaction SMLG
For the RFC-Receiver Adapter the same settings as for the Metadata could be used.
Keep in mind, that for the RFC Sender Adapter a RFC connection of type T must be created in transaction SM59 in system ABC.
Rgds.,
Andreas

Cooling fan not work correctly

my computer says the cooling fan not work correctly plase visit www.hp.com.go/teachcenter/startup

Dear Customer,
Welcome to HP Support Forum and we are glad to assist you
It looks like you are having difficulties with regards to the Cooling Fan of your Netbook
We will surely assist you with this
According to the message you have posted I suspect this is purely a hardware issue where in your getting "System Fan(90B) - The system has detected that a cooling fan is not operating correctly" message. This is a mechanical fault and the Cooling Fan on your Notebook and needs to be replaced before the Notebook starts up with an Overheating Issue.
Causes/Reason for this Issue:
1. Sometimes this is just because of Dust, Pet Animals Hair slowing down the fan
Perform the below shown troubleshooting steps:
Step 01. Turn OFF the Notebook
Step 02. Un-plug the Power/AC Adapter and also remove the Battery too
Step 03. Press and Hold the Power Button of the Notebook for a full minute
Step 04. Now let's re-insert the battery back in and plug back the Power/AC Adapter
Step 05. Start the Notebook and keep tapping F10 Key during the startup to access the BIOS
Step 06. Once you get to the BIOS, Please press F5 Key to load setup defaults for the BIOS
Step 07. Now let's press Esc/Escape Key. Save Changes and Exit - Yes
Step 08. Now please wait till Unit loads Windows and then Shut down the Netbook again
Step 09. You should clean all the Vents and Openings really good with a can of compressed air
Note: If you are still getting the same error we need to replace the fan
I strongly recommend you to immediately Contact HP Technical Support over the Phone for further assistance without any delay to get your Netbook Fan replaced and serviced by an authorized HP Certified Engineer
You can also Check your warranty Here to verify the warranty status
Hope this helps, for any further queries reply to the post and feel free to join us again
**Click the KUDOS star on left to say Thanks**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.
Thank You,
K N R K
Although I am an HP employee, I am speaking for myself and not for HP

[solved] NFS client will not work correctly

I have all my $HOME on an NFS Server. So long I used suse and debian, now I want switch to arch but the nfs-client ist not working correctly:
I start "portmap nfslock nfsd netfs" over rc.conf. When I do a "rpcinfo -p <ip-arch-system>" I got the following
stefan:/home/stefan # rpcinfo -p 192.168.123.3
Program Vers Proto Port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100021 1 udp 32768 nlockmgr
100021 3 udp 32768 nlockmgr
100021 4 udp 32768 nlockmgr
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 4 udp 2049 nfs
100021 1 tcp 48988 nlockmgr
100021 3 tcp 48988 nlockmgr
100021 4 tcp 48988 nlockmgr
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100005 3 udp 891 mountd
100005 3 tcp 894 mountd
As you see "status" is missing, so the statd is not running. It sould look like the result on my suse box:
stefan:/home/stefan # rpcinfo -p 192.168.123.2
Program Vers Proto Port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100024 1 udp 32768 status
100021 1 udp 32768 nlockmgr
100021 3 udp 32768 nlockmgr
100021 4 udp 32768 nlockmgr
100024 1 tcp 35804 status
100021 1 tcp 35804 nlockmgr
100021 3 tcp 35804 nlockmgr
100021 4 tcp 35804 nlockmgr
There is the "status" line and so the statd is running.
How can I fix that problem, so that statd ist running on my arch box too?
Last edited by stka (2007-06-10 15:59:48)

The Problem ist solved.
I use ldap for authentication. During the setup of the ldapclient I copied the nsswitch.ldap to nsswitch.conf. But the line for "hosts:" was:
hosts: dns ldap
but in my dns ist no localhost entry. After I changed this line to:
hosts: files dns ldap
everything was ok. The statd is now running and I can start to migrate to archlinux ;-)

The load balancer is not provisioned error when attempting to deploy a SP 2013 App

Hello:
I am in VS 2013 with SP 2013 colocated on same Win 2008 R2 server. I opened a SP 2013 App and directly hit F5 and got this error:
Error occurred in deployment step 'Install app for SharePoint': The load balancer is not provisioned. Verify the load balancer was provisioned successfully before retrieving endpoint addresses. When creating the project, the first screen asks for a
site to deploy to, and I just took the default, which was http://<servername> for the colocated server.
I googled this and could not find a solution. Would anyone have any direction?
thank you
Harvey
Regards, Harvey

Hi Harvey Flaisher,
Based on the error message, this seems to be a service application not working issue.
Please check the ULS log or Event log to check in which service application the error occurs, like BCS, secure store service, app management service, then re-provision the service application using PowerShell command, or re-create the service application
from UI to check the result.
Thanks,
Qiao Wei
TechNet Community Support

Email pushing not working correctly for office email - 3 seperate devices/carriers

We switched email hosts several months ago and since our email pushing has not worked correctly. Our host/IT guy has been very unwilling to help me through this (I get the pleasure of being the in-house IT source)
I personally am on AT&T have no problems with the other 3 emails I have set up on my blackberry. However I receive my work account one time a day at roughly 6:15. Another user is on Alltel and he receives spotty emails throughout the day, but his gmail account comes through instantly. The third user is on nextel and he receives his 2-3 times per day.
I began to think this was an email host issue since the three of us are all on different carriers, until I found out a fourth user, also on nextel, receives his emails fine.
Users 1-3 are on Outlook 07 on various versions of the Curve. We have all our messages to stay on the server.
User 4 is on the older nextel blackberry push to talk, and is not on outlook.
We do not have an exchange server. Our emails were all set up through our devices.
Any suggestions? The answers I have received through our carriers is to make sure that our messages are set to be left on the server. Everyone else at the office has given up - but for me this is the quest for the Holy Grail.......I'm determined find the answer!
Thank you in advance for any suggestions.
Caitlin Talbot

Potential solution for windows for a side-by-side install. This works for me.
To setup a firefox install side by side so that links from external programs (like email) can open (so you don't get a "Firefox is already running but is not responding" message) do the following.
The solution entails the use of the -no-remote switch. Don't use it for the default browser. Use it for the non default browser.
I'll use firefox 3.6 and firefox 4.0 as examples but this should work for future versions.
+ Install firefox 3.6 and Firefox 4.0 in different directories. Eg.
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Mozilla Firefox 4\firefox.exe
+ Open profile manager. Start > Run : firefox.exe -ProfileManager
+ In profile manager create Two Profiles.
firefox3.6
firefox4
+ In profile manager select firefox 4 as your default (assuming you want to default to the latest) and tick "Don't ask at startup"
+ Create two windows shortcuts.
* General: Mozilla Firefox 4 (default). Shortcut > Target: "C:\Program Files\Mozilla Firefox 4\firefox.exe". Shortcut > Start In: "C:\Program Files\Mozilla Firefox 4"
* General: Mozilla Firefox 3.6. Shortcut > Target: "C:\Program Files\Mozilla Firefox\firefox.exe" -p firefox3.6 -no-remote. Shortcut > Start In: "C:\Program Files\Mozilla Firefox"
That's it. Links from external programs should now open in your default browser.
Further details see. [http://kb.mozillazine.org/Opening_a_new_instance_of_your_Mozilla_application_with_another_profile Opening a new instance of your Mozilla application with another profile]

Text formatting in Numbers is not working correctly.

In Numbers on Chrome text formatting is not working correctly, it's almost as if a CSS file is not being loaded. To be precise, when I try to make a cell Bold there is no bolding. I am using Arial as a font. This has been an issue on Mac and Windows. Any ideas?

Do you have the same problem with Safari or Firefox?

Smart feed not working correctly

hello,
the smart feed are not working correctly in this course page :
https://deimos.apple.com/WebObjects/Core.woa/BrowsePrivately/upmc.fr.2857894925. 02857894930
Modified=01ca6e794f33e660
I don't understand why...

C, sorry…I read your posts out of order. I see that you have links to your smart groups after all. My apologies.
It's as you say, the course pages load up, but I don't see anything in the smart groups. Just thinking out loud here…maybe the search criteria don't genuinely match anything on your site? Perhaps there are actual matches, but you've hidden content with a new credential?…I accessed both pages using the "Unauthenticated" and "All" credentials. My last/craziest guess is that it has something to do with localization…français versus anglais?

Sound blaster not working correctly?

Sound blaster not working correctly #I have a 64 bit, windows vista system.
A Logitech Z-5500 Digital speaker system (one woofer, center speaker, left, right, rear right, left rear speakers, and a seperate control head).
I have an X-fi gamer sound card.
I recently formatted my hard dri've and reinstalled everything. Trying to make everything happy again. Here is my problem:
When I use the Creative Console Launcher (CCL), my front right speaker tests fine. My front left speaker comes out of the woofer. And no other speakers will test at all. It does this in all modes (2., 4., 5. and 7.).
When I play some music, it is coming out of all of the speakers. But it won't test properly in the CCL. So, do I have an issue, does what the CCL is doing not matter, or something else In some games, hearing what direction stuff is coming from matters, so if it is sending sounds to the wrong speakers, then I need to figure out a fix.....hence my post.
Thanks for any help you can give, Robert

Well, as the official documatation states, the Archlinux is for more or less advanced users, and if you're not one, we will make you one
First of all, if you compiled your sound as modules, try putting this in your rc.local:
stat_busy "Activating Sound"
/sbin/modprobe your_sound_module
/sbin/modprobe other_sound_module
/sbin/modprobe yet_other_sound_module
stat_done
Change your_sound_module stuff to your module names as you configured in the kernel, of course.
Second: in order to have two or more sound apps working at the same time, you need some kind of sound server. For default one (esd), uncomment esd in /etc/rc.local (remove ! before it) . After that, you'll have to configure your sound apps to use esd. I know that this is extremely easy with xmms and xine, dunno about others. I do not use esd, because my favorite games (quake3 and half-life) require direct access to /dev/dsp.
And remember: nobody blames for asking 8)

Addon not working on Windows Server 2008 OS

Dear Friends,
I have developed an addon in XP and its working fine with XP operating system but it is not working on Windows Server 2008 Standard. Error is "An Attempt was made to load a program with an incorrect format.(Exception from HRESULT: 0x8007000B)".
Regards,
Mahesh.
Edited by: mahesh A on Sep 19, 2009 9:26 AM

Hi,
Since only Windows 2008 SBS is supported with SAP Business One and that Server is available for 64bit Hardware as defined by Microsoft, I guess you should look into that direction.
Regards
Mario

Load balancing is not working correctly during server fail-over

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